Yes, looks very unusual. Just to realize how to create Emacs mode and how to issue Emacs package (built-in linter is advanced and was really helpful).
- Clone repo (or just copy "hello.el" file)
- Include hello.el file to your
.emacs
config
(load "path/to/hello.el/file")
- Enable hello major mode
(hello-mode)
Simply use C-h h
key to print "Hello, Emacs world!"
message to status line.